B.Tech Direction

If you have done polytechnic diploma then obviously yes, you can get direct second year admission.

Durgapur Institute of Polytechnic does not offer B.Tech in environmental engineering course. 

No, they do not provide lateral entry. You have to start from first year itself to study there. Good luck.

About all private college give admission for direct lateral entry, but if your percentage is good in Diploma you can get good Engineering College. College which give direct admission are:
GNDEC Ludhiana
All PTU College
JSS Noida,
GL Bajaj,
Galgotias University.

You can apply for lateral entry in 2nd year B tech Marine Engg. Require min 60%.

Yes, a degree in mass communication and journalism will of course help you to be a film director. As one can tell the industry is doing quite well for itself and is predicted to do well for some years now. The students of this trade can look forward to working in public relations, television, films, publishing, journalism, editing, direction, etc. Following are the various job profiles offered to graduates in mass communication:
Film Director
Art Director
Editor
Event manager
Video Jockey
Fashion Photographer Cartoonist
Illustrator
Critic
Photojournalist.